Machine for sizing



(Nol Model.)

J. K. DAVIS.

MACHINE FOR SIZING, STRAIGHTENING, AND PINISHING TUBES.

Patented Mar. 2, 1886.

N. PETERS PholO-Lilhogrzpher. Wixhnkan. 11CV NiTEn A'rnNr 'erica JOHN K. DAVIS, OF PHILADELPHIA, PENNSYLVANIA.

MACHIN FOR SIZING, STRAIGHTENING, AND FINISHING TUBES.

SPECIFICATION forming part of Letters Patent No. 336,899, dated March 2,1886.

Application tiled October 20, 188.5. Serial No. 180,391. (No model.)

To all whom t '7n/wy concern:

Beit known that I, JOHN K. DAVIS, of the vcity and county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Machines for Sizing, Straightening, and Finishing Tubes, of which the following is a specification.

My invention has reference to tube sizing, straightening, and polishing machines; and it consists in certain combinations of rolls and their appendages,by which the tube while being rolled in the cold condition and sized is first bent out of shape and then into shape, insuring the simultaneous actions of straightening, sizing, and cold-rolling, and in details of construction, all of which are fully set forth in the following specification, andY shown in the accompanying drawings,which form part thereof.

Heretofore in making tubes the skelp has been rolled upon a mandrel into the tubular shape, and has been then straightened by roll ing between rollers which revolve at substantially right angles to the length of the tube, whereby the tube is given a longitudinal as well as a rotary motion in passing between the straightening-rolls. This method, however, did not insure the outside diameter of the tube being uniform, and great objection was raised to it when the tubes were required for special purposes. The same general idea as that used in straightening wire by bending it first out of line and then intoline is carried,

out in the case of tubes, only with certain necessary'modications. The tube must not be bent much out of shape, but the slight bending enables the rolls B B to effect the object of properly forming each successive ring or metal of which the tube may be conceived as being composed. A tube when lirst welded .is more or lessirregular and full of small bends or crooks, just as wire becomes bent. The tubes as they come from the tube-mill are run through this machine in the cold condition, and the result claimed is attained.

The object of this invention is to provide suitable means by which the tubes formed in the usual manner may be simultaneously straightened, made uniform in diameter throughout their entire length, and to have a certain amount of cold-rolled linish.

In the drawings, Figure l is a side elevation of a machine embodying my improvements. Fig. 2 is a plan view of same. Fig. 3 is a cross-section of a part of same on line x x,- and Fig. 4 is a diagram illustrating the principle involved in the treatment of tubes of this machine.

A is the housing of the machine'for supporting the main pressure or sizing rolls B B` which are provided with bearings b, and are arranged one above the other, but one of which (preferably the upper one) is arranged a little in the rear ofthe other, so that as the tube is moved along between the said rolls there is a tendency to bend it downward to a slight degree. These rolls are grooved upon their peripheries, so as to be of the exact shape necessary t-o be given to the tube. One end of the shafts of the rolls B B is shown with the usual star construction adapted for coupling to a revolving shaft, as is customary in al1 rolling-mills. These rolls B'Bl are driven in opposite directions in any suitable manner customary in rolling-mills. The bearings of these rolls are supported in brasses C, which in turn are supported in caststeel castings C', which are provided with tongues c, which t into corresponding grooves in the housings, which housings are provided with the bearing-receiving slots A. The bearing of the lower roll, B', simply rests in its slot, while the adjustment is made in the bearing to the upper roll by means of the adjustingscrews D', which raise the said bearing and the wedges D, which hold the said bearings down, and which wedges are operated by the screws d and cranknut d. By this means theadjustment of the rolls B B may be accurately determined. To strengthen the upper end of the slot A', owing to the necessity of the use of the wedge, thelinks @and the clamping cam-lever E are provided, the links being fastened to the main part of the hous ing and the cam-lever adapted to press upon the outer face of that portion of the housing on the other sideof the slot, as shown in Fig. l. By making the links e and the cam E as shown they may be thrown back when it is desired to insert a new brass or roll or remove a defective one. l

F is a guide-roller, also having a groove to IOC receive the tube, and is supported in a vertically-adjustable frame, G, which slides in a horizontal adjustable frame,H, and is adj usted vertically by means ot' the screw 7c, which passes through a strap or frame, K, formed upon the upper part of the frame H. This frame H is made adjustable in the frame I, bolted to the housing A,and is guided between the horizontal ribs or rails l1, and is moved by the screw J. In place of using screws Jand lc to adjust these parts any other form of adjusting device may be employed-"as, for instance, a rack and pinion, wedge, Snc. This guide-roller F has an axle, F', upon which it is made laterally adjustable, being` secured in the positions in which it is placed upon the shalt or axle by loclcnuts f.

The guideeroll L is located in the rear of the pressure or sizing rolls and is made adjustable vertically and horizontally, substantially as in the case of the roll F, above described. This roller is arranged below theplane of contact oi' the sizing-rolls B and B', and is journaled in a frame, M', which is pivoted at m tov a longitudinally-sliding frame, M, and upon which it may be raised or lowered by cams or eccentrics N, made adjustable by lever n and notch-segment a', secured to the frame M'. Any other mechanism for raising this frame M may be used, it' desired.

Z isa bracket for the tube, and is secured to the end ofthe frame M', and islocated between the sizing-rolls and rollerL, and is adapted to receive a guidetrough,L', one end of which rests upon the lower sizing-roll, B', and guides the tube upon the roller L. The frame M slides longitudinally upon the frame O, being made adj ustable by ascrew, o, as is common in sliderests of lathes, aud this second frame O is in turn adjustable laterally upon the frame P by adjusting-screw j). By this means the roller L is enabled to have a motion in three directions, or in reality auniversal motion, toproperly adjust it before the sizing-rolls to enable it to perform its function correctly. The adjustability of the rollers F and L is designed to cause the tubes to be fed through and delivered from the sizingrolls B B' and be guided in a direct line, and also to enable the amount of bend given to t-he tube in the process of straightening to be increased or decreased. The vertical adjustability is also necessary when changin the diameters or sizes of the guide-rollers F L for tubes of different SIZCS.

It is self-evident that the rolls B and B might be arranged one above the other, and that'the rollers L and F might be arranged higher or lower than a line drawn at right angles to a plane through the axes of rolls B B to accomplish the same effects as are attained by locating the upper roller, B, slightly to the rear ofthe lower roll, B', the only necessity being that the rollers must be so located that the tube is iirst bent downward, then upward, or vice versa, in the act of passing between them, as is clearly indicated by the diagram, Fig. 4. The rollers may be arranged horizontally, if desired.

In operation the tube is first fed under the roller F, by which its rearward end is held down while the tube is passing through the sizing rollers B B', where it is made absolutely correct in diameter and at the same time given a cold-rolled finish. Vhile the tube passes between the rollersB B' it is bent downward and is received upon the guide L' and then upon the roller L, which latter bends it upward, the reverse bending action imparted to the tube insuring its being accurately straightcned.

It is self-evident that the details of construction may be greatly modified without in any wise departing from the essential feature of this invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. ln a machine for straightening and sizing tubes, the combination of two sizingrolls with two guide-rolls, one being arranged in front and one in the rearol' said sizing-rolls, and so located that the tube in passing between said sizingrolls is bent tlrst out of line and then straightened, substantially as and for the purpose specified.

'2.I In a machine for straightening and sizing tubes, the combination ot' two sizing-rolls with two adjustable guide-rolls, one being arranged in front and onein the rear of said sizing-rolls, and so located that the tube in passing between said sizing-rolls is bent first out oi' line and then straightend, substantially as and for the purpose specified.

3. AIn a machine for straightening tubes, a series of rolls between which the tube must pass, the said rolls being arranged out of line sufficient to cause the tube to be iirst abnormally bent and then straightened, substantially as and for the purpose specified.

4. In a machine for straightening and sizing tubes, a pair of sizing-rolls, in combination with a guide-roller so arranged with reference to the sizing-rolls that the tubeafter leaving the latter is bent by said guide-roller, and means -to adjust said guide-roller vertically and to or from said sizing-rolls, the said adjustments being independent ofeach other, substantial] y as and for the purpose specified.

5. In a machine forstraightening and sizing tubes, a pair of sizing-rolls, in combination with a guide roller so arranged with reference to the sizing-rolls that the tube after leaving thelatter is bent by said guide-roller, and suitable means, substantially as set forth, to adjust said guide-roller vertically and laterally, substantially as and for the purpose specified.

6. In a machine for straightening and sizing tubes, a pair of sizing'rolls, in combination with a guide-roller located at some distance from the sizing-rolls, and so arranged with ref- IOO erence to the sizing-rolls that the tube is held in one lateral direction while it is bent by the action of the sizing-rolls, substantially as and for the purpose specified. j

7. In a machine for straightening and sizing tubes, a pair of sizing-rolls, in combination with a guide-roller located at some distance from the sizing-rolls, and so arranged with reference to the sizing-rolls that the tube is held in one lateral direction while it is bent by the action of the sizing-rolls, and suitable means, substantially as set forth, to adj ust said guide-roller vertically and to or from the sizing-rolls, substantially as and for the purpose specied. A

8. The combination of rolls B B with rollers F and L, adapted to act on opposite sides of the tube, substantially as and for the purpose specitied.

9. ln a machine for sizing and straightening tubes, adjustable guide-rollers for the tube, in combination with compressing and bending rolls arranged between said guide-rollers and adapted to cause a reverse bending action on said tube during its passage through said rollers, substantially as and for thepurpose specilied.

l0. The combination of housing A, having bearing-slots with cast-steel cases C, bearings G, adjustingscrew D,wedges D, links e, cams E, and rolls B B', substantially as and for the purpose specified.

l1. The combination of rolls B B and their housing with roller F, frames G H and their adjustingscrews k J, and roller L, substantially as' and for the purpose specified.

l2. The combination of rolls B B and their housing with roller F, frames G H and their adjusting-screws k J, roller L, frames M, M,

O, and P, and means, substantially as described, to adjust said frames, substantially as and for the purpose specied.

13. The combination of rolls B B with roller L, longitudinally-adjustable frame M, hinged frame M', carrying said roller L, transverselyadjustable frame O, and stationary bed-frame P, substantially as and for the purpose specitied.

14.. The combination oi'rolls B B with roller L, longitudinally-adjustable frame M, hinged frame M, carrying said roller L, transverselyadjustable frame O, stationary bed-frame P, and cam devices to adjust the frame M upon frame M, substantially as and for the purpose specified. j

15. In a tube straightening and sizing machine, the combination of two compressing or sizing rolls, one of which is arranged alittle to the rear of the other, and a guide to hold the tube while being fed through said rolls, whereby the tube is bent out of' line in passing through the same, substantially as and for the purpose specied.

16. The combination ofthe compressing or sizing rolls with a front guide-roller, L, made adjustable vertically, laterally, and longitudinally, substantially as and for the purpose specified. i

In testimony of which invention I hereunto Set my hand.

JOHN K. DAVIS.

Witnesses:

HARRY S. MoULToN, R. S. REED. 

